Today, when I configured eclipse + Flex + spring and other ides, I found that fb3 (Flex builder 3) cannot be compatible with javaee eclipse. I can only think of other tricks. The following is an article I found on Google that describes how to install WTP on fb3:
(From: http://dylandepass.com/blog? P = 41)
Recently I tried to set up a Java backend with Tomcat 6.0 to use with Flex. I have to say that I ran into a few problems that caused me a bit of a headache, so I thought I wocould share my solution to hopefully help anyone else who might have this problem.
If you are looking to create a Java backend with the Database Wizard that comes with Flex builder you will need to install the web tool platform (WTP) plugin for eclipse. WTP contains various tools for developing web and J2EE applications.
The problem I ran into was locating this plugin inside the "Find updates" feature of FB. unfortunetly the WTP plugin is called something else so I was searching around for the words WTP only to realize that it's not present in the list of Addons and features that comes up. what your actually looking for is the "web and J2EE development" features which has des the Web standard tools (WST) and the java standard tools (JST) which from my understanding are two of the main components of the WTP.
Here are the steps to install WTP in flex Builder
1. Select help> Software Updates> Find and install> search for new features to install
2. Check the Europa and Eclipse project Depots
3. Under Europa discovery site select the "web and J2EE development"
4. Click the select required button to include all the dependent features for the install
Hope this helps someone!
Later, I tried to install the flex builder 3 plug-in on Eclipse, and then install the WTP Eclipse plug-in.